Paintwork coating composition and coating cloth

ABSTRACT

To provide a paintwork coating composition that is harmless to the environments and humans and enables a paintwork to be fully coated by the application of only a small quantity of coating composition and also provide a coating cloth that provides a smooth rubbing work in the coating process and can develop a good water-repellent property and a good antifouling property, water dispersion comprising polytetrafluoroethylene and perfluoropolyether is prepared as the coating composition, and also the coating composition is impregnated in a cloth having a basis weight of 30-300 g/m 2  and a density of 0.02-0.3 g/cm 3  under load condition of 1.961 KPa.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a paintwork coating compositionand to a coating cloth and, more particularly, to a paintwork coatingcomposition to coat a paintwork in a vehicle and the like and to acoating cloth.

[0003] 2. Description of Background Art

[0004] Car waxes have been widely used for coating a paintwork in avehicle. Usually, the car wax comprises a mixture of a wax component toprotect and polish a paintwork in a vehicle and a silicone oil toprovide a water-repellent property to the paintwork. A variety of carwaxes having various properties are known, including cake, paste-formwax and liquid-form wax.

[0005] Some car waxes use a wax component that is subjected to fouling,depending on its composition and content. For improvement in antifoulingof a paintwork, for example, Japanese Patent Publication No. Hei6(1994)-13,663 proposed a coating treatment comprising 1-50 weight % oflow molecular weight polytetrafluoroethylene having a molecular weightof 1,000 to 100,000 and 0.1-25 weight % of perfluoropolyether.

[0006] Fluorochemical wax is superior to silicon wax in antifoulingproperty of the coated paintwork. In view of this, for example, JapaneseLaid-open (Unexamined) Patent Publication No. Hei 5(1995)-130,963proposed a car wax-applying wet sheet comprising a non-woven fabricsheet wetted by a fluorochemical wax.

[0007] Meanwhile, in recent years, the so-called dry bright type of carwaxes requiring no wiping of wax after applied to the paintwork arebecoming widely used. Since the dry bright type of car wax requires nowiping of wax, it has the advantage that the waxing can be done in asimple work and in a short time.

[0008] The coating treatment disclosed by Japanese Patent PublicationNo. Hei 6(1994)-13,663 cited above uses an organic solvent, such asnaphtha for industrial use, as dispersion solvent ofpolytetrafluoroethylene and perfluoropolyether, as referred to in theexamples, and as such is not really desirable for the environments andthe humans.

[0009] With this coating treatment, when the wax is applied to thepaintwork, the quantity of adherence of wax to the paintwork perquantity of wax applied thereto is small. Accordingly, a large quantityof wax is practically required for the application of the wax to thepaintwork and, after the waxing, the wiping of the wax is required.Consequently, it is difficult to apply this coating treatment to the drybright type of wax requiring a small quantity of wax and requiring nowiping of the wax.

[0010] Further, the fluorochemical wax has a good antifouling propertyof the coating of paintwork, but even the fluorochemical wax having thesame components may fail to form a good coating on the paintwork,depending upon the type of cloth used, so that the water-repellentproperty and the antifouling property may reduce.

[0011] In the dry bright type wax, in particular, the cloth usedreflects on the waxing performance significantly, because a smallquantity of wax is applied to the paintwork and also there is a need toeliminate the wiping of the wax after the application of wax.

[0012] It is an object of the invention to provide a paintwork coatingcomposition that is harmless to the environments and humans and enablesthe paintwork to be fully coated by the application of only a smallquantity of coating composition. It is another object of the inventionto provide a coating cloth that provides a smooth rubbing work in thecoating process and can develop a good water-repellent property and agood antifouling property.

SUMMARY OF THE INVENTION

[0013] The present invention provides a novel paintwork coatingcomposition comprising water dispersion comprisingpolytetrafuluoroethylene and perfluoropolyether.

[0014] According to the paintwork coating composition of the presentinvention, the quantity of adherence of the coating composition to thepaintwork per quantity of coating composition applied thereto is large.Therefore, the coating composition of the present invention can suitablybe used as the coating composition of the dry bright type requiring nowipe after a small quantity of coating composition is rubbed thereon.Further, since the paintwork coating composition of the presentinvention is water dispersion, good working conditions harmless toenvironments and humans can be ensured. Thus, the coating composition ofthe present invention is harmless to the environments and humans andalso can be effectively used as the non-wipe coating composition forsimplifying the coating work and finishing it in a short time.

[0015] In the paintwork coating composition of the present invention, itis preferable that the water dispersion of polytetrafluoroethylene andthe water dispersion of perfluoropolyether are mixed.

[0016] In the paintwork coating composition of the present invention, itis preferable that the content of polytetrafluoroethylene is not morethan 0.8 weight % per total quantity of paintwork coating composition.

[0017] In the paint coating composition of the present invention, it ispreferable that a hydrophilic organic modified silicone oil is furthermixed. It is preferable that the hydrophilic organic modified siliconeoil is polyether modified silicone oil.

[0018] In the paintwork coating composition of the present invention, itis preferable that ion cross-linked organic acids is further mixed as athickening agent.

[0019] The present invention provides a novel coating cloth wherein acoating composition comprising polytetrafluoroethylene andperfluoropolyether is impregnated in a cloth having a basis weight of30-300 g/m² and a density of 0.02-0.3 g/cm³ under load condition of1.961 KPa.

[0020] According to the coating cloth of the present invention, thesmooth rubbing work in the coating process can be ensured and also thecoating having little unevenness can be formed on the paintwork, so thatthe good water-repellent property and the good antifouling property aredeveloped. Particularly, when the coating composition is impregnated inthe cloth in the form of water dispersion, polytetrafluoroethylene andperfluoropolyether are stably dispersed in water before the rubbing ofthe coating composition, while, once the coating composition is rubbedover the paintwork, they are allowed to adequately adhere to thepaintwork by the rubbing force and are hardly reverted into water.Consequently, the quantity of adherence of the coating composition tothe paintwork per quantity of coating composition applied thereto islarge. Therefore, the coating cloth of the present invention cansuitably be used as the coating cloth of the dry bright type requiringno wipe after a small quantity of coating composition is rubbed thereon.Further, the cloth impregnated with the coating composition can dispensewith the organic solvent, so good working conditions for environmentsand humans can be ensured.

[0021] In the coating cloth of the present invention, it is preferablethat the coating composition is water dispersion comprisingpolytetrafluoroethylene and perfluoropolyether. Also, it is preferablethat the content of polytetrafluoroethylene in the coating compositionis not more than 0.8 weight %.

[0022] In the coating cloth of the present invention, it is preferablethat a hydrophilic organic modified silicone oil, or polyether modifiedsilicone oil, in particular, is further mixed in the coatingcomposition. Also, it is preferable that ion cross-linked organic acidsis further mixed in the coating composition as a thickening agent.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0023] A paintwork coating composition of the present invention(hereinafter it is simply referred to as “the coating composition”,which is equivalent to “the paintwork coating composition”, unlessotherwise specified.) comprises water dispersion comprisingpolytetrafluoroethylene and perfluoropolyether.

[0024] Polytetrafluoroethylene (hereinafter it is sometimes abbreviatedto PTFE) can be produced, for example, by polymerizing tetraethylenefluoride in a known manner. Polytetrafluoroethylene having a numberaverage molecular weight of 1,000 to 1,000,000 or preferably of 3,000 to500,000 is preferably used. Polytetrafluoroethylenes that may be usedinclude commercially available products, such as Lubron L Series(available from Daikin Industries, Ltd., PTFE powder), Fluon L Series(available from Asahi I.C.I. Fluoropolymers Co., Ltd., PTFE powder),Fluon CD Series (available from Asahi Glass Co., Ltd., PTFE powder),Hostaflon Series (available from Dyneon, PTFE powder), Teflon TFE(available from Du Pont-Mitsui Fluorochemicals Co., Ltd., PTFE powder),KTL, KT Series (available from Kitamura Ltd., PTFE powder), Cefral lube(available from Central Glass Co., Ltd., PTFE powder) and Algoflon(available from Ausimont K.K., PTFE powder).

[0025] Perfluoropolyethers that may be used include polymers and theirderivatives having the structure of the following formulas (1) to (4),which can be produced by a known method, such as by ring-openingaddition polymerization of perfluoroalkylene oxide or by irradiation ofperfluoroalkenes with ultraviolet.

[0026] (In the formulas (1)-(4) given above, m represents an integer of1-300 and n represents an integer of 1-210)

[0027] Perfluoropolyether having a number average molecular weight of400 to 20,000 or preferably of 1,000 to 15,000 is preferably used.Commercially available products may be used as the perfluoropolyether.For example, KRYTOX Series (available from Du Pont de Numours & Co.) canbe cited as equivalent of the one having the structural formula (1);FOMBLIN Series, Y-type (available from Ausimont K.K.) can be cited asequivalent of the one having the structural formula (2); FOMBLIN Series,M-type and Z-type (available from Ausimont K.K.) can be cited asequivalent of the one having the structural formula (3); and DEMNUMSeries (available from Daikin Industries, Ltd.) can be cited asequivalent of the one having the structural formula (4).

[0028] The coating composition of the present invention can be producedby dispersing polytetrafluoroethylene and perfluoropolyether in water.The dispersion of polytetrafluoroethylene and perfluoropolyether inwater can be obtained, for example, by mixing and agitatingpolytetrafluoroethylene, perfluoropolyether and a dispersing agent andthen adding water to the mixture, to forcibly disperse them in water.

[0029] Dispersing agents that may be used include, for example, (i)anionic surface active agents typified by Na, K, Li, ammonia, morpholineand alkanolamine salt, such as higher fatty acid salt including oleicacid, alkylbenzene sulfonate, alkyl sulfate, polyoxyalkyl sulfate andalkan sulfonate, (ii) nonionic surface active agents typified bypolyoxyethylene derivatives, such as polyoxyethylene alkyl ether,polyoxyethylene alkyl aryl ether, sorbitan fatty acid ester,polyoxyethylene sorbitan fatty acid ester, polyhydric alcohol fatty acidester, polyoxyethylene alkylamine, polyoxyethylene fatty acid ester,oxyethylene oxypropylene block polymer, fatty acid alkanolamide, amineoxide and others, (iii) cationic surface active agents typified byalkylamine salt and quaternary ammonium salt, etc., (iv) amphotericionic surface active agents typified by e.g. alkylbetaine, and (v)polyacrylic acid salt typified by e.g. polyacrylic acid ammonium. Inaddition, commonly used surface active agents, such as fluorochemicalsurface active agent and silicon surface active agent, having theemulsification property and the solubilization and dispersion propertymay be used. For example, polyacrylic acid salt is preferably used,though it depends upon its intended purposes and applications.

[0030] For example, 0.01-0.8 weight %, or preferably 0.05-0.5 weight %,of polytetrafluoroethylene, 0.01-5.0 weight %, or preferably 0.1-2.0weight %, of perfluoropolyether, and 0.01-10.0 weight %, or preferably0.1-5.0 weight %, of dispersing agent are mixed per the total quantityof water dispersion and, then, the mixture is added into water andagitated to be forcibly dispersed in water. The quantity used can bereduced by using the fluorochemical surface active agent.

[0031] The water dispersion thus obtained takes the state in whichpolytetrafluoroethylene and perfluoropolyether are dispersed in water inan emulsified form or in a suspended form. When the water dispersiontakes the state in which they are dispersed in water in the emulsifiedform, a stable oil-in-water (O/W) emulsion is formed in whichpolytetrafluoroethylene and perfluoropoly ether exist in micelle. Whenthe water dispersion takes the state in which they are dispersed inwater in the suspended form, a stable suspension is formed in whichpolytetrafluoroethylene and perfluoropolyether are dispersed in a blockform or in an oil spot form.

[0032] While the coating composition of the present invention may beproduced by forcibly dispersing polytetrafluoroethylene andperfluoropolyether in water, it is further preferable that the waterdispersion comprising polytetrafluoroethylene and perfluoropolyether isproduced by mixing the water dispersion of polytetrafluoroethylene aswas prepared in advance and the water dispersion of perfluoropolyetheras was prepared in advance.

[0033] The mixing of the water dispersion of polytetrafluoroethylene andthe water dispersion of perfluoropolyether takes the state in whichpolytetrafluoroethylene and perfluoropolyether are separately dispersedin water in the emulsified form or in the suspended form. When the waterdispersion takes the state in which they are dispersed in water in theemulsified form, a stable mixed solution of oil-in-water (O/W) emulsionis formed in which polytetrafluoroethylene and perfluoropolyetherseparately exist in micelle. When the water dispersion takes the statein which they are dispersed in water in the suspended form, a stablemixed solution of suspension is formed in which polytetrafluoroethyleneand perfluoropolyether are separately dispersed in a block form or in anoil spot form.

[0034] The coating composition of the present invention comprising themixture of the water dispersion of polytetrafluoroethylene and the waterdispersion of perfluoropolyether has the characteristic feature thatpolytetrafluoroethylene and perfluoropolyether are kept in the state ofbeing separately and stably dispersed in water, before the rubbing ofthe coating composition, while, at the time of the rubbing of thecoating composition, they are mixed with each other while beingadhesively rubbed on the paintwork by the rubbing force. Consequently, asmooth rubbing work in the coating process can be ensured and also agood coating of even in coating thickness can be obtained, as comparedwith the coating composition comprising polytetrafluoroethylene andperfluoropolyether which are forcibly dispersed from the beginning.

[0035] The water dispersion of polytetrafluoroethylene can be obtainedas the water dispersion of polytetrafluoroethylene as it is by a knownprocess such as a solution polymerization process or an emulsionpolymerization process.

[0036] The water dispersions of polytetrafluoroethylene that may be usedinclude commercially available products, such as KRYTOX DF/W (availablefrom Du Pont de Numours & Co., PTFE emulsion with a solid content of 20weight % and a number average molecular weight of 3,500), KRYTOXLW-1,200 (available from Du Pont de Numours & Co., PTFE emulsion with asolid content of 20 weight % and a number average molecular weight of40,000), Fluon AD Series (available from Asahi I.C.I. FluoropolymersCo., Ltd., PTFE dispersion), Hostaflon 5,000 Series (available fromDyneon, PTFE dispersion), and Lubron LDW-40 (available from DaikinIndustries, Ltd., PTFE dispersion).

[0037] The water dispersion of perfluoropolyether can also be obtained,for example, by the emulsion polymerization process or the forcibledispersion process, as is the case with the process above. The waterdispersion of perfluoropolyether that may be used include commerciallyavailable products. Of the commercially available products cited above,L-205 (available from Chukyo Yushi K.K., perfluoropolyether emulsion, anonvolatile content of 64 weight %), K-926 (available from Chukyo YushiK.K., perfluoropolyether emulsion, a nonvolatile content of 64 weight%), L-287 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %), NIKKOL NET-HC Series(available from Nikko Chemicals Co., Ltd., perfluoropolyether emulsion),NIKKOL NET-U Series (available from Nikko Chemicals Co., Ltd.,perfluoropolyether emulsion), and FOMBLIN Emulsion FE-20 Series(available from Ausimont K.K., perfluoropolyether emulsion) can becited, for example.

[0038] The coating composition of the present invention thus obtained ispreferably prepared so that polytetrafluoroethylene of a solid contentof not more than 0.8 weight %, or preferably not more than 0.5 weight %,or particularly 0.05-0.5 weight % can be contained in the waterdispersion comprising polytetrafluoroethylene and perfluoropolyether (orin the total quantity of coating composition when various components aremixed therein, as will be mentioned later). With not more than 0.8weight % of polytetrafluoroethylene, the coating composition can beeffectively applied to the dry bright type of car wax requiring only asmall quantity of wax to be rubbed on the paintwork and no wiping, asmentioned later.

[0039] In addition, the coating composition of the present invention ispreferably prepared so that 0.01-5.0 weight %, or preferably 0.1-2.0weight %, of perfluoropolyether is contained in the water dispersioncomprising polytetrafluoroethylene and perfluoropolyether (or in thetotal quantity of coating composition when various components are mixedtherein, as will be mentioned later). With not more than 0.01 weight %of perfluoropolyether, there is the possibility that sufficientpolishing and water-repellent and oil-repellent properties may not beobtained. With not less than 5.0 weight % of perfluoropolyether, thereis the possibility that the oil may remain excessively on the paintwork,which may cause unevenness in coating thickness.

[0040] In the coating composition of the present invention, organicmodified silicone oil may further be mixed. Organic modified siliconeoils that may be used include, for example, (i) hydrophobic organicmodified silicone oils, such as dimethyl silicone oil, methylphenylsilicone oil, methylhydrodiene silicone oil, alkyl modified siliconeoil, alkylaralkyl modified silicone oil, fluorine modified silicone oil,epoxy modified silicone oil, epoxypolyether modified silicone oil,phenol modified silicone oil and acryl modified silicone oil, (ii)hydrophilic organic modified silicone oil, such as polyether modifiedsilicone oil, alcohol modified silicone oil, amino modified siliconeoil, carboxyl modified silicone oil and mercapto modified silicone oil,and (iii) other modified silicone oils into which various organicfunctional groups are introduced. The organic modified silicone oils maybe used singularly or in combination of two or more. It is to be notedthat the hydrophobic organic modified silicone oils and the hydrophilicorganic modified silicone oil cited above are classified under commonmethods of classification. To be more specific, the belonging to thehydrophobic organic modified silicone oils or the hydrophilic organicmodified silicone oil is determined properly under a ratio ofmodification of hydrophilic group and hydrophobic group.

[0041] Of these, the hydrophilic organic modified silicone oil ispreferably used in the coating composition of the present invention.More specifically, nonionic organic modified silicone oil, such aspolyether modified silicone oil, and ionic organic modified siliconeoil, such as amino modified silicone oil and carboxyl modified siliconeoil, are preferably used in the coating composition of the presentinvention. When hydrophilic organic modified silicone oil is mixed inthe coating composition, the smooth rubbing work in the coating processcan be ensured and also the good coating of even in coating thicknesscan be obtained. Particularly when the polyether modified silicone oilis mixed in the coating composition, that effect is significantlydeveloped.

[0042] Polyether modified silicone oils that may be used include, forexample, (i) silicone oils with modified polyether in which polysiloxaneis modified with polyoxyalkylene, such asdimethylsiloxane.methyl(polyoxyethylene)siloxane copolymer,dimethylsiloxane.methyl(polyoxyethylene.polyoxypropylene)siloxanecopolymer, and polyoxyethylene.methylpolysiloxane copolymer, and (ii)fluorine.polyether modified silicone oils modified by alkyl fluoride.For example, those having HLB (hydrophile-lipophile balance) of about 10are preferably used.

[0043] Polyether modified silicone oils that may be used includecommercially available products, such as KF-353, KF-618, KF-354 andKF-355 (available from Shin-Etsu Chemical Co., Ltd., polyether modifiedsilicone), FPD Series (Shin-Etsu Chemical Co., Ltd., fluorine.polyethermodified silicone), SH3746, SH3749, SH8400 and SH8410 (available fromDow Corning Toray Silicone Co., Ltd., polyether modified silicone), andL03 and L051 (Wacker Asahikasei Silicone Co., Ltd., polyether modifiedsilicone).

[0044] The coating composition of the present invention is preferablyprepared so that 0.01-3.0 weight %, or preferably 0.01-0.5 weight %, oforganic modified silicone oil is contained in the total quantity ofcoating composition. With not more than 0.01 weight % of organicmodified silicone oil, there is the possibility that at the time ofrubbing of the wax, unevenness in coating thickness may be caused tohinder the smooth rubbing treatment. With not less than 3.0 weight % oforganic modified silicone oil, the evenness in coating thickness can beprovided, but the initial water-repellent and oil-repellent propertiesand the persistence may reduce.

[0045] In the coating composition of the present invention, wax, resinand thickening agent may preferably be mixed for the intended purposesand applications.

[0046] The waxes that may be used include, for example, (i) naturalwaxes typified by carnauba wax, candelilla wax, montan wax, ceresin,paraffin, microcrystalline wax and ozokerite, (ii) acid waxes and esterwaxes and derivatives thereof based on α-olefin wax, Fischer-Tropsch waxand derivatives thereof, polyolefin wax and derivatives thereof,paraffin oxide, microcrystalline wax oxide, castor wax and montan wax,(iii) wax-like material typified by lanolin derivatives, petroleumolefin-based olefin and maleic acid anhydride or acrylic acid, waxescomprising vinyl acetate, metal soap, fat and oil, higher fatty acid,higher alcohol, hydrogenerated oil, aliphatic acid amide and polyether,and (iv) a variety of modified waxes such as fluorine modified wax,silicone modified wax and resin modified wax. The wax may be usedsingularly or in combination of two or more. The wax mixed can provideimproved coating or polishing of the paintwork. The wax is preferablyused in the form of the water dispersion of the emulsion form orsuspension form. The coating composition of the present invention ispreferably prepared so that 0.01-5.0 weight %, or preferably 0.02-3.0weight %, of wax is contained in the total quantity of coatingcomposition.

[0047] The resins that may be used include, for example, silicone resin,fluorochemical resin, petroleum resin, terpene resin, alicyclichydrocarbon resin, alkyd resin, polyamide resin, polyurethane resin,phenol resin, urea melamine resin, polyester resin, amino resin,melamine resin, acrylic resin, vinyl resin, urea resin, epoxy resin,rosin modified resin, amino alkyd resin, modified alkyd resin, naturalresin, ketone resin and rosin resin. The resin may be used singularly orin combination of two or more. The resin mixed can provide improvedgrab. The resin is preferably used in the form of the water dispersionof the emulsion form or suspension form. The coating composition of thepresent invention is preferably prepared so that 0.01-3.0 weight %, orpreferably 0.02-1.0 weight %, of resin is contained in the totalquantity of coating composition.

[0048] The thickening agents that may be used include, for example, ioncross-linked organic acids, gums, minerals and celluloses. In additionto these, they also include agar, gelatin and polyacrylamide.

[0049] Examples of the ion cross-linked organic acids are organic acids,such as polyacrylic acid and alginic acid, in which ions arecross-linked by addition of salt, so that molecular chains are extendedto develop the thickening property. For the polyacrylic acid, the saltsadded include, for example, inorganic alkalis, such as sodium hydroxide,potassium hydroxide, sodium carbonate, sodium hydrogen carbonate andammonia, and alkalis including organic amines, such as monoethanolamine,diethanolamine, triethanolamine, triethylamine, di-isopropanolamine,di-(2-ethylhexyl)amine, aminomethylpropanol, tromethamine andtetrahydroxypropylethylene diamine. For the alginic acid, the saltsadded include, for example, divalent metallic salts, such as calciumchloride and magnesium chloride. These salts are used in equivalencerequired to neutralize the carboxylic acid of the organic acid.

[0050] The gums that may be used include, for example, gum arabic,Cyamoposis Gum and derivatives thereof, vee gum, xanthan gum, Welan gum,ramthan gum and gelan gum. The minerals that may be used include, forexample, bentonite and montmorillonite. The celluloses that may be usedinclude, for example, carboxymethyl cellulose, hydroxyethyl celluloseand hydroxypropyl cellulose. The thicknening agents may be usedsingularly or in combination of two or more. The mixture of thethickening agent can provide improved control of sediment of componentand improved solution stability.

[0051] Of these, the ion cross-linked organic acids are preferably usedin the coating composition of the present invention. The mixture of theion cross-linked organic acids can develop water retentioncharacteristics to improve workability, so that a good coating havingeven thickness can be realized.

[0052] The thickening agent is preferably adjusted so that whenthickening agent is contained in the coating composition, the coatingcomposition can have the viscosity of 0.05-200 Pa·s, or preferably0.180Pa·s.

[0053] Further, a variety of usually added additives, such as polishingagent, surface active agent, abrasive, dye, pigment, perfume agent,lubricant, ultraviolet absorption agent and oxidation inhibitor may bemixed in the coating composition of the present invention. For example,the mixture of lubricant, such as silicone powder and wax powder, canprovide an improved wiping property.

[0054] In the coating composition of the present invention, thecomponents cited above are mixed in water in the proportion mentionedabove and agitated to be uniformly dispersed in water to thereby producethe water dispersion. It is to be noted that when the thickening agentis added, it can be mixed in the initial stage or last stage or in anyselective stage of mixing the respective components, to thicken thecoating composition of the present invention uniformly for improvementof viscosity thereof.

[0055] The coating composition of the present invention thus producedcan be applied to the coating of paintworks in metals, plastics,ceramics and woods, without limiting to any specific paintwork. To bemore specific, the coating composition of the present invention can beapplied to the coating of paintworks in vehicles, aircrafts, boats andships, heavy machinery, machines in various industries, furniture,electrical household appliances and electrical equipment, and a varietyof household appliances.

[0056] When the paintwork is treated by use of the coating compositionof the present invention, e.g. about 5-50 g, or preferably about 15-40g, per square meter of coating composition can be used and rubbed overthe paintwork with a cloth until the paintwork is cleaned up.

[0057] According to the coating composition of the present invention,polytetrafluoroethylene and perfluoropolyether are stably dispersed inwater before the rubbing of the coating composition, while, once thecoating composition is rubbed over the paintwork, they are allowed toadequately adhere to the paintwork by the rubbing force and are hardlyreverted into water. Consequently, the quantity of adherence of thecoating composition to the paintwork per quantity of coating compositionapplied thereto is large. Therefore, the coating composition of thepresent invention can suitably be used as the coating composition of thedry bright type requiring no wipe after a small quantity of coatingcomposition is rubbed thereon.

[0058] Further, according to the coating composition of the presentinvention, water is used, instead of organic solvent, as the dispersionsolvent of polytetrafluoroethylene and perfluoropolyether. Due to this,the coating composition is desirable for the environments and thehumans, and good working conditions are ensured.

[0059] Thus, the coating composition of the present invention isharmless to the environments and humans and also can be effectively usedas the non-wipe wax for simplifying the waxing work and finishing it ina short time.

[0060] In addition, the coating cloth of the present invention is formedby a cloth having a basis weight (unit representing mass per unit areaof fabric, a gram number per square meter) of 30-300 g/m² and a densityof 0.02-0.3 g/cm³ under load condition of 1.961 KPa being impregnatedwith coating composition comprising polytetrafluoroethylene andperfluoropolyether (the coating composition defined herein is notlimited to the coating composition above, as long as it comprisespolytetrafluoroethylene and perfluoropolyether) or preferably with thesame coating composition as above.

[0061] The cloth used in the present invention is a cloth having a basisweight of 30-300 g/m², or preferably 40-200 g/m², and a density of0.02-0.3 g/cm³, or preferably 0.1-0.25 g/cm³, under load condition of1.961 KPa.

[0062] With the cloth having a basis weight smaller than that, thethickness of the cloth is reduced excessively and thus the retentionvolume of the coating composition impregnated is reduced, so that thecoating composition cannot be fully impregnated in the cloth. As aresult of this, such a cloth cannot wax the paintwork to a sufficientextent. On the other hand, with the cloth having a basis weight largerthan that, the thickness of the cloth is increased excessively and thusthe processing of the cloth and the workability in the waxing treatmentare lowered.

[0063] Also, with the density smaller than that under load condition of1.961 KPa, the retention of impregnated coating composition in the clothis reduced and the retention volume is also reduced, accordingly. As aresult of this, such a cloth cannot wax the paintwork to a sufficientextent. Additionally, in the waxing work, the quantity of coatingcomposition discharged from the cloth impregnated with the coatingcomposition is increased and, as a result, surplus components adhere tothe paintwork and thus the coating having even thickness cannot beformed on the paintwork. With the density of larger than that, theretention volume is reduced and thus the quantity of coating compositiondischarged from the cloth impregnated with the coating composition isreduced and, as a result, a sufficient quantity of components do notadhere to the paintwork.

[0064] The cloth can be used without any particular limitation, as longas it has a basis weight and a density in the range specified above.Preferably, the non-woven fabric is used. The non-woven fabrics that maybe used include, for example, wet non-woven fabric, dry pulp non-wovenfabric, dry non-woven fabric, spun-bonded non-woven fabric, melt-blownon-woven fabric and flash spun non-woven fabric.

[0065] To be more specific, the non-woven fabrics that may be usedinclude, for example, 100% polyester, dry, needle-punched, non-wovenfabric (basis weight of 110 g/m² and density of 0.07 g/cm³ under loadcondition of 1.961 KPa), 100% rayon, dry, spun-lace non-woven fabric(basis weight of 40 g/m² and density of 0.18 g/cm³ under load conditionof 1.961 KPa), 100% nylon, melt-blow non-woven fabric (basis weight of50 g/m² and density of 0.15 g/cm³ under load condition of 1.961 KPa),70% acryl and 30% polyester blended, wet, spun-lace, non-woven fabric(basis weight of 40 g/m² and density of 0.15 g/cm³ under load conditionof 1.961 KPa), 50% polypropylene and 50% polyester blended, dry,thermal-bonded, non-woven fabric (basis weight of 40 g/m² and density of0.12 g/cm³ under load condition of 1.961 KPa), 25% nylon, 25%polyethylene and 50% rayon blended, dry, chemical-bonded, non-wovenfabric (basis weight of 40 g/m² and density of 0.12 g/cm³ under loadcondition of 1.961 KPa) and 25% nylon, 25% polyethylene and 25%polyester and 25% rayon blended, dry, spun-lace, non-woven fabric (basisweight of 85 g/m² and density of 0.17 g/cm³ under load condition of1.961 KPa).

[0066] The methods of impregnating the cloth with the coatingcomposition that may be used include, for example, a dip roll coater, arotogravure roll coater, a spray coater, a reverse roll coater, a directroll coater, a kiss roll coater, an inverse knife coater, an air knifecoater, an opposite knife coater and a brush application. The coatingcloth of the present invention can be produced by impregnating thecoating composition in the fabric in any of those known methods. Thecoating composition is often made to shower over the fabric from above,the method of which is called a showering method.

[0067] The coating composition is impregnated in the cloth in theproportion of the coating composition being 1.0 to 5.0 times, orpreferably 1.5 to 4.0 times, the cloth in weight.

[0068] The coating cloth of the present invention thus produced can beapplied to the coating of paintworks in metals, plastics, ceramics andwoods, without limiting to any specific paintwork. To be more specific,the coating cloth of the present invention can be applied to the coatingof paintworks in vehicles, aircrafts, boats and ships, heavy machinery,machines in various industries, furniture, electrical householdappliances and electrical equipment, and a variety of householdappliances.

[0069] When the paintwork is treated by use of the coating cloth of thepresent invention, the paintwork is rubbed with the coating cloth of theinvention until the paintwork is cleaned up so that the paintwork can becoated with the coating composition.

[0070] With the coating cloth of the present invention, the smoothrubbing work in the coating process can be ensured and also the goodcoating of even in coating thickness can be formed on the paintwork andthus the good water-repellent property and the good antifouling propertycan be developed. Particularly, when the coating composition isimpregnated in the cloth in the form of water dispersion,polytetrafluoroethylene and perfluoropolyether are stably dispersed inwater before the rubbing of the coating composition, while, once thecoating composition is rubbed over the paintwork, they are allowed toadequately adhere to the paintwork by the rubbing force and are hardlyreverted into water. Consequently, the quantity of adherence of thecoating composition to the paintwork per quantity of coating compositionapplied thereto is large. Therefore, the coating cloth of the presentinvention can suitably be used as the coating cloth of the dry brighttype requiring no wipe after a small quantity of coating composition isrubbed thereon. Further, the cloth impregnated with the coatingcomposition in the form of water dispersion can dispense with theorganic solvent, so good working conditions for environments and humanscan be ensured.

EXAMPLES

[0071] In the following, the present invention will be described infurther detail with reference to Examples and Comparative Examples. Thepresent invention is not in any manner limited to these Examples andComparative Examples, however.

Example 1

[0072] KRYTOX DF/W (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 3,500): 2.0 weight %

[0073] L-205 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 2.0 weight %

[0074] ion exchange water: 96.0 weight %

[0075] The components above were added in order to ion exchange waterwith stirring to be uniformly dispersed therein, to thereby produce thecoating composition.

[0076] Example 2

[0077] Hostaflon TF5050 (available from Dyneon, PTFE dispersion, a solidcontent of 58 weight %): 1.0 weight %

[0078] KRYTOX LW-1200 (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 40,000): 1.0 weight %

[0079] K-926 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 2.5 weight %

[0080] KF-618 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0081] ion exchange water: 93.9 weight %

[0082] The components above were added in order to ion exchange waterwith stirring to be uniformly dispersed therein, to thereby produce thecoating composition.

Example 3

[0083] Lubron LDW-40 (available from Daikin Industries, Ltd., PTFEdispersion, a solid content of 40 weight %): 1.0 weight %

[0084] NET-HC-04 (available from Nikko Chemicals Co., Ltd.,perfluoropolyether emulsion, a nonvolatile content of 65 weight %) 3.0weight %

[0085] F-354 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0086] Emustar 0001 (available from NIPPON SEIRO CO., LTD.,Microcrystalline Wax Emulsion, a solid content of 40 weight %): 1.0weight %

[0087] Hiviswako 104 (available from Wako Pure Chemical Industries,Ltd., Ion cross-linked polyacrylic acid): 0.1 weight %

[0088] Triethanol amine (90 weight % of aqueous solution): 0.15 weight %

[0089] ion exchange water: 94.65 weight %

[0090] After Hiviswako 104 was dissolved in ion exchange water, LubronLDW-40 , L-205, KF-354 and Emustar 0001 were added in order withstirring to be uniformly dispersed therein. Thereafter, triethanol aminewas added thereto to thicken the composition uniformly, to therebyproduce the coating composition.

Example 4

[0091] Hostaflon TF5050 (available from Dyneon, PTFE dispersion, a solidcontent of 58 weight %): 0.7 weight %

[0092] K-926 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 3.0 weight %

[0093] FPD-4668 (available from Shin-Etsu Chemical Co., Ltd.,fluorine-polyether modified silicone oil): 0.1 weight %

[0094] Selosol D-355 (available from Chukyo Yushi K.K., petroleum resinemulsion, a solid content of 40 weight %): 0.5 weight %

[0095] Sodium alginate (available from KIBUN FOOD CHEMIFA CO., LTD.):0.3 weight %

[0096] Calcium Chloride: 0.06 weight %

[0097] ion exchange water: 95.34 weight %

[0098] After sodium alginate was dissolved in ion exchange water,calcium chloride was added and uniformly dispersed therein. Thereafter,Hostaflon TF5050, K-926, FPD-4668, and Selosol D-355 were added withstirring to be uniformly dispersed therein, to thereby produce thecoating composition.

Example 5

[0099] KRYTOX DF/W (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 3,500): 1.5 weight %

[0100] KRYTOX LW-1200 (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 40,000): 1.5 weight %

[0101] K-926 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 4.0 weight %

[0102] FPD-4668 (available from Shin-Etsu Chemical Co., Ltd., fluorine-polyether modified silicone oil): 0.2 weight %

[0103] J-642 (available from Chukyo Yushi K.K., polyethylene waxemulsion, a solid content of 35 weight %): 1.0 weight %

[0104] Selosol D-355 (available from Chukyo Yushi K.K., petroleum resinemulsion, a solid content of 40 weight %): 0.5 weight %

[0105] Hiviswako 104 (available from Wako Pure Chemical Industries,Ltd., Ion cross-linked polyacrylic acid): 0.5 weight %

[0106] Morpholine: 1.0 weight %

[0107] ion exchange water: 89.9 weight %

[0108] After Hiviswako 104 was dissolved in ion exchange water, KRYTOXDF/W, KRYTOX LW-1200, L-205, FPD-4668, J-642 and Selosol D-355 wereadded in order with stirring to be uniformly dispersed therein.Thereafter, morpholine was added thereto to thicken the compositionuniformly, to thereby produce the coating composition.

Example 6

[0109] KRYTOX DF/W (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 3,500): 1.0 weight %

[0110] NET-HC-04 (available from Nikko Chemicals Co., Ltd.,perfluoropolyether emulsion, a nonvolatile content of 65 weight %): 2.0weight %

[0111] FPD-4668 (available from Shin-Etsu Chemical Co., Ltd., fluorine-polyether modified silicone oil): 0.1 weight %

[0112] Selosol D-355 (available from Chukyo Yushi K.K., petroleum resinemulsion, a solid content of 40 weight %): 0.5 weight %

[0113] Hiviswako 104 (available from Wako Pure Chemical Industries,Ltd., Ion cross-linked polyacrylic acid): 0.05 weight %

[0114] Ammonia water (28 weight % of aqueous solution): 0.05 weight %

[0115] ion exchange water: 96.3 weight %

[0116] After Hiviswako 104 was dissolved in ion exchange water, ammoniawater was added thereto to thicken the composition uniformly.Thereafter, KRYTOX DF/W, NET-HC-04, FPD-4668, and Selosol D-355 wereadded in order with stirring to be uniformly dispersed therein, tothereby produce the coating composition.

Example 7

[0117] Lubron LDW-40 (available from Daikin Industries, Ltd., PTFEdispersion, a solid content of 40 weight %): 1.0 weight %

[0118] L-205 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 2.0 weight %

[0119] KF-354 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0120] BY22-840 (available from Dow Corning Toray Silicone Co., Ltd.,carboxyl modified silicone oil emulsion, a nonvolatile content of 35weight %): 0.3 weight %

[0121] ion exchange water: 96.6 weight %

[0122] The components above were added in order to ion exchange waterwith stirring to be uniformly dispersed therein, to thereby produce thecoating composition.

Example 8

[0123] KRYTOX LW-1200 (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 40,000): 2.0 weight %

[0124] NET-HC-04 (available from Nikko Chemicals Co., Ltd.,perfluoropolyether emulsion, a nonvolatile content of 65 weight %): 2.0weight %

[0125] KF-354 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0126] SH7036 (available from Dow Corning Toray Silicone Co., Ltd.,dimethyl silicone oil emulsion, a nonvolatile content of 38 weight %):0.3 weight %

[0127] ion exchange water: 95.6 weight %

[0128] The components above were added in order to ion exchange waterwith stirring to be uniformly dispersed therein, to thereby produce thecoating composition.

Example 9

[0129] KRYTOX DF/W (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 3,500): 2.5 weight %

[0130] Hostaflon TF5050 (available from Dyneon, PTFE dispersion, a solidcontent of 58 weight %): 0.4 weight %

[0131] K-926 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 2.5 weight %

[0132] KF-618 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0133] Kunipia G (available from Kunimine Industries, montmorillonite):2.0 weight %

[0134] ion exchange water: 92.51 weight %

[0135] After KRYTOX DF/W, Hostaflon TF5050, L-205 and KF-618 were addedin order to ion exchange water with stirring to be uniformly dispersedin the water, Kunipia G was gradually added thereto with stirring tothicken the composition uniformly, to thereby produce the coatingcomposition.

Example 10

[0136] Hostaflon TF5050 (available from Dyneon, PTFE dispersion, a solidcontent of 58 weight %): 1.0 weight %

[0137] Lubron LDW-40 (available from Daikin Industries, Ltd., PTFEdispersion, a solid content of 40 weight %): 0.5 weight %

[0138] L-205 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 2.5 weight %

[0139] KF-618 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0140] Kelzan (available from KIBUN FOOD CHEMIFA CO., LTD., xanthangum): 0.3 weight %

[0141] ion exchange water: 94.1 weight %

[0142] After KRYTOX DF/W, Lubron LDW-40, L-205 and KF-618 were added inorder to ion exchange water with stirring to be uniformly dispersed inthe water, Kelzan was gradually added thereto with stirring to thickenthe composition uniformly, to thereby produce the coating composition.

Example 11

[0143] Lubron L-2 (available from Daikin Industries, Ltd., PTFE powder):5.0 weight %

[0144] FOMBLIN Y-04 (available from Ausimont K.K., perfluoropolyether):20.0 weight %

[0145] Surflon S-141 (available from Asahi Glass Co., Ltd.,fluorochemical active agent): 2.0 weight %

[0146] ion exchange water: 73.0 weight %

[0147] After Lubron L-2 and FOMBLIN Y-04 were uniformly mixed so as tobe formed into a grease form, Surflon S-141 was added to be uniformlydispersed in the mixture. Sequentially, ion exchange water was graduallyadded with stirring to be uniformly dispersed therein, to therebyprepare the water dispersion comprising polytetrafluoroethylene andperfluoropolyether.

[0148] Sequentially, in the following composition, Hiviswako 104 wasdissolved in the ion exchange water and, thereafter, the waterdispersion and FPD-4668 were added in order with stirring to beuniformly dispersed therein. Thereafter, monoethanol amine was addedtherein to thicken the composition uniformly, to thereby produce thecoating composition.

[0149] Water dispersion: 10.0 weight %

[0150] FPD-4668 (available from Shin-Etsu Chemical Co., Ltd.,fluorine-polyether modified silicone oil): 0.1 weight %

[0151] Hiviswako 104 (available from Wako Pure Chemical Industries,Ltd., Ion cross-linked polyacrylic acid): 0.1 weight %

[0152] Monoethanol amine (90 weight % aqueous solution) 0.02 weight %

[0153] Ion exchange water: 89.0 weight %

Example 12

[0154] KRYTOX DF/W (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 3,500): 7.5 weight %

[0155] L-205 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 5.0 weight %

[0156] KF-618 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0157] ion exchange water: 87.4 weight %

[0158] The components were added in order to ion exchange water withstirring to be uniformly dispersed therein, to thereby produce thecoating composition.

Comparative Example 1

[0159] AG-Lub (available from Asahi Glass Co., Ltd., PTFE CFC-solvedispersion, a solid content of 7 weight %, a number average molecularweight of 3,500): 10.0 weight %

[0160] FOMBLIN Y-04 (available from Ausimont K.K., perfluoropolyether):1.5 weight %

[0161] naphtha for industrial use: 89.0 weight %

[0162] AG-Lub and FOMBLIN Y-04 were added in order to naphtha forindustrial use with stirring to be uniformly dispersed therein, tothereby produce the coating composition.

Comparative Example 2

[0163] Lubron L-5 (available from Daikin Industries, Ltd., PTFE powder):0.5 weight %

[0164] FOMBLIN Y-04 (available from Ausimont K.K., perfluoropolyether):2.0 weight %

[0165] PF-5080 (available from Sumitomo 3M Ltd., fluorochemicalsolvent): 97.0 weight %

[0166] Lubron L-5 and FOMBLIN Y-04 were uniformly mixed to be formedinto a grease form, PF-5080 was added to be uniformly dispersed in themixture, to thereby produce the coating composition.

Evaluation (Wax Treatment Test)

[0167] With the coating compositions of Examples 1-12 and ComparativeExamples 1-2 as the samples, the wax treatments were given to a whitepaintwork in a hood portion of a car body of Corolla, model year of1998, produced by Toyota Motor Corporation, in accordance with thefollowing procedures, to make the evaluation on (1) workability inrubbing and uniformity in coating (presence or absence of unevenness),(2) water-repellent property immediately after treatment, (3)persistence of water-repellent property and (4) antifouling property ofcoating. The results are shown in TABLE 1.

[0168] 1) Fouling on the paintwork in the hood portion of the car bodywas removed by use of a commercially available cleaner wax and, further,the wax coating still remaining on the paintwork was removed completelyby use of aliphatic solvent.

[0169] 2) The paintwork in the hood portion of the car was divided into15 sections. 3.0 g of sample per section (about 30 cm×35 cm) was takenin a cotton towel, and the paintwork was rubbed with the towel until thepaintwork was cleaned up. The same treatments as this were given to thefourteen sections of the paintwork by using the samples of Examples 1-12and Comparative Examples 1-2. The remaining one section was kept blank.TABLE 1 Comparative Examples Examples 1 2 3 4 5 6 7 8 9 10 11 12 1 2Workability in Δ ⊚ ⊚ ⊚ ⊚ ⊚ ∘ Δ ∘ ∘ Δ Δ × × rubbing and uniformity incoating Water-repellent ⊚ ⊚ ⊚ ⊚ ⊚ ⊚ ∘ ∘ Δ Δ ⊚ ⊚ × × immediately aftertreatment Persistence of ∘ ∘ ⊚ ⊚ ⊚ ⊚ ∘ Δ Δ ∘ ∘ ∘ Δ Δ water-repellentAntifouling ∘ ∘ ⊚ ⊚ ⊚ ⊚ ∘ ∘ ∘ ∘ ∘ ∘ × × property of coating

Production Example 1 (Preparation of Coating Composition A)

[0170] KRYTOX DF/W (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 3,500): 2.0 weight %

[0171] L-205 (available from Chukyo Yushi K.K., Ltd., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 2.0 weight %

[0172] ion exchange water: 96.0 weight %

[0173] The components above were added in order to ion exchange waterwith stirring to be uniformly dispersed, to thereby prepare the coatingcomposition A.

Production Example 2 (Preparation of Coating Composition B)

[0174] KRYTOX DF/W (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 3,500): 2.5 weight %

[0175] KRYTOX LW-1200 (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 40,000): 1.0 weight %

[0176] L-205 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 2.5 weight %

[0177] KF-618 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0178] ion exchange water: 93.9 weight %

[0179] The components above were added in order to ion exchange waterwith stirring to be uniformly dispersed therein, to thereby prepare thecoating composition B.

Production Example 3 (Preparation of Coating Composition C)

[0180] Lubron LDW-40 (available from Daikin Industries, Ltd., PTFEdispersion, a solid content of 40 weight %): 1.5 weight %

[0181] K-926 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 3.0 weight %

[0182] KF-354 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0183] Emustar 0001 (available from NIPPON SEIRO CO., LTD.,Microcrystalline Wax Emulsion, a solid content of 40 weight %): 1.0weight %

[0184] Hiviswako 104 (available from Wako Pure Chemical Industries,Ltd., Ion cross-linked polyacrylic acid): 0.1 weight %

[0185] Triethanol amine (90 weight % of aqueous solution): 0.15 weight %

[0186] ion exchange water: 94.15 weight %

[0187] After Hiviswako 104 was dissolved in ion exchange water, LubronLDW-40 , K-926, KF-354 and Emustar 0001 were added in order thereto withstirring to be uniformly dispersed in the water. Thereafter, triethanolamine was added thereto to thicken the composition uniformly, to therebyprepare the coating composition C.

Production Example 4 (Preparation of Coating Composition D)

[0188] KRYTOX LW-1200 (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 40,000): 3.0 weight %

[0189] K-926 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 3.0 weight %

[0190] FPD-4668 (available from Shin-Etsu Chemical Co., Ltd.,fluorine-polyether modified silicone oil): 0.1 weight %

[0191] Selosol D-355 (available from Chukyo Yushi K.K., petroleum resinemulsion, a solid content of 40 weight %): 0.5 weight %

[0192] Sodium alginate (available from KIBUN FOOD CHEMIFA CO., LTD.):0.3 weight %

[0193] Calcium Chloride: 0.06 weight %

[0194] Ion exchange water: 93.04 weight %

[0195] After sodium alginate was dissolved in ion exchange water,calcium chloride was added to uniformly thicken the composition.Thereafter, KRYTOX LW-1200, K-926, FPD-4668, and Selosol D-355 wereadded with stirring to be uniformly dispersed therein, to therebyprepare the coating composition D.

Production Example 5 (Preparation of Coating Composition E)

[0196] Hostaflon TF5050 (available from Dyneon, PTFE dispersion, a solidcontent of 58 weight %): 1.5 weight %

[0197] L-205 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 4.0 weight %

[0198] KF-618 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0199] Surflon S-141 (available from Asahi Glass Co., Ltd.,fluorochemical active agent): 0.1 weight %

[0200] Hiviswako 104 (available from Wako Pure Chemical Industries,Ltd., Ion cross-linked polyacrylic acid): 0.05 weight %

[0201] Ammonia water (28 weight % of aqueous solution): 0.05 weight %

[0202] Ion exchange water: 94.2 weight %

[0203] After Hiviswako 104 was dissolved in ion exchange water,Hostaflon TF5050, L-205, KF-618, and Surflon S-141 were added in orderwith stirring to be uniformly dispersed therein. Thereafter, ammoniawater was added thereto to thicken the composition uniformly, to therebyprepare the coating composition E.

Production Example 6 (Preparation of Coating Composition F)

[0204] Lubron LDW-40 (available from Daikin Industries, Ltd., PTFEdispersion, a solid content of 40 weight %): 1.0 weight %

[0205] L-205 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 2.0 weight %

[0206] FPD-4668 (available from Shin-Etsu Chemical Co., Ltd.,fluorine-polyether modified silicone oil): 0.1 weight %

[0207] Fluoromontanate emulsion (available from Clariant (Japan) K.K.,fluorochemical wax emulsion, a solid content of 21.2 weight %): 1.0weight %

[0208] Hiviswako 104 (available from Wako Pure Chemical Industries,Ltd., Ion cross-linked polyacrylic acid): 0.05 weight %

[0209] Ammonia water (28 weight % of aqueous solution): 0.05 weight %

[0210] ion exchange water: 95.8 weight %

[0211] After Hiviswako 104 was dissolved in ion exchange water, LubronLDW-40, L-205, FPD-4668 and Fluoromontanate emulsion were added in orderwith stirring to be uniformed dispersed therein. Thereafter, ammoniawater was added thereto to thicken the composition uniformly, to therebyprepare the coating composition F.

Production Example 7 (Preparation of Coating Composition G)

[0212] KRYTOX DF/W (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 3,500): 1.5 weight %

[0213] KRYTOX LW-1200 (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 40,000): 1.5 weight %

[0214] L-205 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 4.0 weight %

[0215] FPD-4668 (available from Shin-Etsu Chemical Co., Ltd., fluorine-polyether modified silicone oil): 0.1 weight %

[0216] Lumiflon FE-3000 (available from Asahi Glass Co., Ltd.,fluorocarbon resin emulsion, a nonvolatile content of 50 weight %): 0.1weight %

[0217] Sodium alginate (available from KIBUN FOOD CHEMIFA CO., LTD.):0.3 weight %

[0218] Calcium Chloride: 0.06 weight %

[0219] ion exchange water: 92.54 weight %

[0220] After sodium alginate was dissolved in ion exchange water,calcium chloride was added therein to uniformly thicken the composition.Thereafter, KRYTOX DF/W, KRYTOX LW-1200, L-205, FPD-4668 and LimiflonFE-3000 were added in order with stirring to be uniformly dispersedtherein, to thereby prepare the coating composition G.

Production Example 8 (Preparation of Coating Composition H)

[0221] K-926 (available from Chukyo Yushi K.K., perfluoropolyetheremulsion, a nonvolatile content of 64 weight %): 3.0 weight %

[0222] Emustar 0001 (available from NIPPON SEIRO CO., LTD.,Microcrystalline Wax Emulsion, a solid content of 40 weight %): 1.0weight %

[0223] KF-354 (available from Shin-Etsu Chemical Co., Ltd., polyethermodified silicone oil polyoxyethylene.methylpolysiloxane copolymer): 0.1weight %

[0224] Ion exchange water: 95.9 weight %

[0225] The components above were added in order to ion exchange waterwith stirring to be uniformly dispersed therein, to thereby prepare thecoating composition H.

Production Example 9 (Preparation of Coating Composition I)

[0226] Lubron LDW-40 (available from Daikin Industries, Ltd., PTFEdispersion, a solid content of 40 weight %): 1.5 weight %

[0227] FPD-4668 (available from Shin-Etsu Chemical Co., Ltd., fluorine-polyether modified silicone oil): 0.1 weight %

[0228] Hiviswako 104 (available from Wako Pure Chemical Industries,Ltd., Ion cross-linked polyacrylic acid): 0.05 weight %

[0229] Ammonia water (28 weight % of aqueous solution): 0.05 weight %

[0230] Ion exchange water: 98.3 weight %

[0231] After Hiviswako 104 was dissolved in ion exchange water, LubronLDW-40 and FPD-4668 were added in order with stirring to be uniformlydispersed therein. Thereafter, ammonia water was added therein, tothicken the composition uniformly, to thereby prepare the coatingcomposition I.

Production Example 10 (Preparation of Coating Composition J)

[0232] Fluoromontanate emulsion (available from Clariant (Japan) K.K.,fluorochemical wax emulsion, a solid content of 21.2 weight %): 5.0weight %

[0233] FPD-4668 (available from Shin-Etsu Chemical Co., Ltd.,fluorine-polyether modified silicone oil): 0.1 weight %

[0234] Ion exchange water: 94.9 weight %

[0235] The compositions were added in order to ion exchange water withstirring to be uniformly dispersed therein, to thereby prepare thecoating composition J.

Production Example 11 (Preparation of Coating Composition K)

[0236] KRYTOX LW-1200 (available from Du Pont de Numours & Co., PTFEemulsion, a solid content of 20 weight %, and a number average molecularweight of 40,000): 3.0 weight %

[0237] Lumiflon FE-3000 (available from Asahi Glass Co., Ltd.,fluorocarbon resin emulsion, a nonvolatile content of 50 weight %): 0.1weight %

[0238] Hiviswako 104 (available from Wako Pure Chemical Industries,Ltd., Ion cross-linked polyacrylic acid): 0.05 weight %

[0239] Ammonia water (28 weight % of aqueous solution): 0.05 weight %

[0240] Ion exchange water: 96.8 weight %

[0241] After Hiviswako 104 was dissolved in ion exchange water, KRYTOXLW-1200 and Lumiflon FE-3000 were added in order with stirring to beuniformly dispersed therein. Thereafter, ammonia water was addedtherein, to thicken the composition uniformly, to thereby prepare thecoating composition K.

Production Example 12 (Preparation of Coating Composition L)

[0242] Emustar 0001 (available from NIPPON SEIRO CO., LTD.,Microcrystalline Wax Emulsion, a solid content of 40 weight %): 2.5weight %

[0243] BY-22-007 (available from Dow Corning Toray Silicone Co., Ltd.,dimethyl silicone oil emulsion, a nonvolatile content of 50 weight %):2.0 weight %

[0244] Ion exchange water: 95.5 weight %

[0245] The components were added in order to ion exchange water withstirring to be uniformly dispersed therein, to thereby prepare thecoating composition L.

Examples 13-33 and Comparative Examples 3-21

[0246] The coating compositions A-L thus obtained were impregnated inthe non-woven fabrics A-G, each being cut to 30×40 cm, in such aproportion that the coating compositions are 2.5 times the non-wovenfabrics in weight in the combinations shown in TABLE 1, to therebyprepare the coating cloths of Examples 13-33 and Comparative Examples3-21.

[0247] Non-woven fabric A: 100% polyester non-woven fabric (basis weightof 70 g/m² and density of 0.07 g/cm³ under load condition of 1.961 KPa);

[0248] Non-woven fabric B: 30% nylon, 30% polyester and 40% rayonblended, non-woven fabric (basis weight of 70 g/m² and density of 0.16g/cm³ under load condition of 1.961 KPa);

[0249] Non-woven fabric C: 100% rayon non-woven fabric (basis weight of120 g/m² and density of 0.18 g/cm³ under load condition of 1.961 KPa);

[0250] Non-woven fabric D: 50% rayon and 50% polyester blended,non-woven fabric (basis weight of 16 g/m² and density of 0.14 g/cm³under load condition of 1.961 KPa);

[0251] Non-woven fabric E: 50% nylon and 50% polyester blended,non-woven fabric (basis weight of 350 g/m² and density of 0.23 g/cm³under load condition of 1.961 KPa);

[0252] Non-woven fabric F: 50% polyethylene and 50% polyester blended,non-woven fabric (basis weight of 100 g/m² and density of 0.01 g/cm³under load condition of 1.961 KPa); and

[0253] Non-woven fabric G: 100% nylon non-woven fabric (basis weight of130 g/m² and density of 0.33 g/cm³ under load condition of 1.961 KPa)

Evaluation (Wax Treatment Test)

[0254] The wax treatments were given to a white paintwork in a hoodportion of a car body of each of two Corollas, model year of 1998,produced by Toyota Motor Corporation by rubbing the paintwork with thecoating cloths of Examples 13-33 and Comparative Examples 3-21 inaccordance with the following procedures, and the evaluation was made on(1) workability in rubbing and uniformity in coating (presence orabsence of unevenness), (2) water-repellent property immediately aftertreatment, (3) persistence of water-repellent property and (4)antifouling property of coating. The results are shown in TABLE 2.

[0255] 1) Fouling on the paintwork in the hood portion of the car bodywas removed by use of a commercially available cleaner wax and, further,the wax coating still remaining on the paintwork was removed completelyby use of aliphatic solvent.

[0256] 2) The paintwork in the hood portion of the car body was dividedinto a required number of sections, and the paintwork in each section(about 30×35 cm) was rubbed with the coating cloth until the paintworkwas cleaned up. The same rubbing as this was made by using the samplesof the coating cloths of Examples 13-33 and Comparative Examples 3-21.TABLE 2 Examples 13 14 15 16 17 18 19 20 21 22 CoatingComponents A A A BB B C C C D Non-wovenfabric A B C A B C A B C A (1) Workability inrubbing and Δ ∘ ∘ ∘ ⊚ ∘ ∘ ⊚ ∘ ∘ uniformity in coating (2)Water-repellent immediately Δ ∘ ∘ Δ ⊚ ∘ ∘ ⊚ ∘ ∘ after treatment (3)Persistence of water-repellent Δ Δ Δ Δ ∘ Δ ∘ ⊚ ∘ ∘ (4) Antifoulingproperty of coating Δ ∘ Δ Δ ∘ Δ ∘ ⊚ ∘ ∘ Examples 23 24 25 26 27 28 29 3031 32 33 Coating Components D D E E E F F F G G G Non-woven fabric B C AB C A B C A B C (1) Workability in rubbing and ⊚ ∘ ∘ ⊚ ∘ ∘ ⊚ ∘ ∘ ⊚ ∘uniformity in coating (2) Water-repellent immediately ⊚ ∘ ∘ ∘ ∘ ⊚ ⊚ ⊚ ⊚⊚ ⊚ after treatment (3) Persistence of water-repellent ⊚ ∘ ∘ ⊚ ∘ ∘ ⊚ ∘ ∘⊚ ∘ (4) Antifouling property of coating ⊚ ∘ ∘ ⊚ ∘ ∘ ⊚ ∘ ∘ ⊚ ∘ Compara.Ex. 3 4 5 6 7 8 9 10 11 12 Coating Components H H H I I I J J J KNon-woven fabric A B C A B C A B C A (1) Workability in rubbing and X ΔX X X X X Δ X X uniformity in coating (2) Water-repellentimmediately X ΔX X X X X Δ X X after treatment (3) Persistence of water-repellent X X XX X X X X X X (4) Antifouling property of coating X X X X X X X X X XCompara. Ex. 13 14 15 16 17 18 19 20 21 Coating Components K K L L L B BB B Non-woven fabric B C A B C D E F G (1) Workability in rubbing and XX X Δ X Δ X X X uniformity in coating (2) Water-repellent immediately ΔX Δ Δ Δ Δ Δ X X after treatment (3) Persistence of water-repellent Δ X XX X X Δ X X (4) Antifouling property of coating Δ X X X X X Δ X X

[0257] While the illustrative examples of the present invention areprovided in the above description, such is for illustrative purpose onlyand it is not to be construed restrictively. Modification and variationof the present invention that will be obvious to those skilled in theart is to be covered in the following claims.

What is claimed is:
 1. A paintwork coating composition comprising waterdispersion comprising polytetrafuluoroethylene and perfluoropolyether.2. The paintwork coating composition according to claim 1, wherein thewater dispersion of polytetrafluoroethylene and the water dispersion ofperfluoropolyether are mixed.
 3. The paintwork coating compositionaccording to claim 1, wherein the content of polytetrafluoroethylene isnot more than 0.8 weight % per total quantity of paintwork coatingcomposition.
 4. The paintwork coating composition according to claim 1,wherein a hydrophilic organic modified silicone oil is further mixed. 5.The paintwork coating composition according to claim 4, wherein thehydrophilic organic modified silicone oil is polyether modified siliconeoil.
 6. The paintwork coating composition according to claim 1, whereinion cross-linked organic acids is further mixed as a thickening agent.7. A coating cloth wherein a coating composition comprisingpolytetrafluoroethylene and perfluoropolyether is impregnated in a clothhaving a basis weight of 30-300 g/m² and a density of 0.02-0.3 g/cm³under load condition of 1.961 KPa.
 8. The coating cloth according toclaim 7, wherein the coating composition is water dispersion comprisingpolytetrafluoroethylene and perfluoropolyether.
 9. The coating clothaccording to claim 7, wherein the content of polytetrafluoroethylene inthe coating composition is not more than 0.8 weight %.
 10. The coatingcloth according to claim 7, wherein a hydrophilic organic modifiedsilicone oil is further mixed in the coating composition.
 11. Thecoating cloth according to claim 10, wherein the hydrophilic organicmodified silicone oil is polyether modified silicone oil.
 12. Thecoating cloth according to claim 7, wherein ion cross-linked organicacids is further mixed in the coating composition as a thickening agent.